I have a grid in which user can add as many rows as he wants and there are two textboxes (Minimum Value & Maximum Value). When the user enters Min and Max value. I am checking whether the range that user has entered is already there in the database. if yes then it shows me an alert. I am doing this on focusout Now the problem is that the alert keeps popping up infinite times when I click from one textbox directly to another textbox. Can anyone help me with this?

Here is the function on my focus out

function CheckValidation(obj) {

  var ajx = new AJAXsupport();
  ajx.resetVar();
  ajx.addData('CL', 'CheckValidation');

  var sucSave = function() {
    if (ajx.getRefreshText() != "0") {
      alert(ajx.getMessage());
      $('#btnSave').attr('disabled', 'disabled');
      return false;
    } else {
      $('#btnSave').attr('disabled', false);
    }
  }
  customSave(ajx, sucSave);
}
}